NPI registry status
Active
2026 NPPES data Child & Adolescent Psychiatry Physician NPI 1992766299 M.D.
Verify on CMS → Patrick Chau, M.D.
Child & Adolescent Psychiatry Physician in Sioux City, Iowa.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,300 in Child & Adolescent Psychiatry Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
5K
Medicare Part D claims · 196 beneficiaries · Child & Adolescent Psychiatry Physician avg: 608
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.5K
122 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Patrick Chau, M.D. filed 4,690 Medicare Part D claims in 2024 as a Child & Adolescent Psychiatry Physician in Sioux City, Iowa, prescribing 86% generic.
- 5K
- Part D claims, 2024
- 86%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥93rd
- pct by Part D claim volume (lower-bound band)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Patrick Chau, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1992766299), first enumerated 03/28/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,690 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
2 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$2.5K in reported industry payments (122 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1992766299 · Child & Adolescent Psychiatry Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1992766299
- ENUM-LEGACY 2006
- TAX-MID 6K Child &
- RX-MID 4,690
- BOOK-THIN 34 in Iowa
- PHOTO-ENUM Ileana Bernal-Schnat… · 2006
Patrick Chau, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
4,690 ≥ 93rd percentile 93% of 1,416,883 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Patrick Chau, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Patrick Chau, M.D.?
Quality data not reportedPrimary specialty
Child & Adolescent Psychiatry Physician
Medicare Part D claims
4,690 8× vs specialty avg
Specialty distribution in Iowa
How Child & Adolescent Psychiatry Physician compares to other specialties among Iowa providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Child & Adolescent Psychiatry Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1992766299 |
|---|---|
| Specialty | Child & Adolescent Psychiatry Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/28/2006 |
Hospital and facility affiliations
Facilities where Patrick Chau, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Omaha Tribe OF Nebraska
Macy, NE
Rodney J Dean MD, PC
Sioux City, IA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Patrick Chau, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.5K
Largest payer
Supernus Pharmaceuticals, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Patrick Chau, M.D. - brand share 14.0%
Child & Adolescent Psychiatry Physician average
14% brand-name claims vs 86% generic, on 4,690 2024 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
4,690
Total Claims
$1.0M
Total Drug Cost
196
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,148.8
- Total Day Supply
- 135,842
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $941K
- Generic Drug Cost
- $82K
Patient Demographics
- Average Patient Age
- 64.7 years
- Avg HCC Risk Score
- 2.21
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 76, 65-74: 78, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Patrick Chau, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Fluoxetine Hcl
Fluoxetine Hcl
404 claims
- Trazodone Hcl
Trazodone Hcl
312 claims
- Olanzapine
Olanzapine
293 claims
- Quetiapine Fumarate
Quetiapine Fumarate
281 claims
- Rexulti
Rexulti
280 claims
- Propranolol Hcl
Propranolol Hcl
199 claims
- Mirtazapine
Mirtazapine
172 claims
- Duloxetine Hcl
Duloxetine Hcl
167 claims
| Drug | Claims |
|---|---|
| Fluoxetine Hcl | 404 |
| Trazodone Hcl | 312 |
| Olanzapine | 293 |
| Quetiapine Fumarate | 281 |
| Rexulti Brexpiprazole | 280 |
| Propranolol Hcl | 199 |
| Mirtazapine | 172 |
| Duloxetine Hcl | 167 |
| Sertraline Hcl | 148 |
| Escitalopram Oxalate | 147 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Child & Adolescent Psychiatry Physician Overview
How Patrick Chau, M.D. fits within the Child & Adolescent Psychiatry Physician landscape nationally.
6,300
Child & Adolescent Psychiatry Physician Providers in US
54
States with Child & Adolescent Psychiatry Physician
608
Avg Claims per Provider
Patrick Chau, M.D.'s 4,690 claims are above the specialty average of 608.
Nationwide Child & Adolescent Psychiatry Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chau, both outside Iowa so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Child & Adolescent Psychiatry Physician Providers in Iowa
Other clinicians with the same primary specialty enrolled in Iowa, drawn from the same CMS NPPES roster as Chau.
One of 34 Child & Adolescent Psychiatry Physician providers enrolled in Iowa, 5 are shown here.
Dr. Terrence Augspurger
M.D., CHILD PSYCHIAT
Marshalltown, IA
Dr. Ashmita Banerjee
M.D.
Iowa City, IA
Dr. James Beeghly
MD
Iowa City, IA
Dr. Deanna Boesen
M.D.
Des Moines, IA
Dr. Taylor Boudreaux
MD
Iowa City, IA
Compare Child & Adolescent Psychiatry Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Patrick Chau, M.D.'s specialty? ▼
Patrick Chau, M.D. specializes in Child & Adolescent Psychiatry Physician and practices in Sioux City, Iowa. Credentials: M.D..
How much does Patrick Chau, M.D. prescribe under Medicare Part D? ▼
In 2024, Patrick Chau, M.D. wrote 4,690 Medicare Part D claims totaling $1.0M in drug costs for 196 beneficiaries.
Where is Patrick Chau, M.D. located? ▼
Patrick Chau, M.D. is located at 3549 SOUTHERN HILLS DR, Sioux City, IA, 51106. Phone: (712) 274-6729.
What is Patrick Chau, M.D.'s NPI number? ▼
Patrick Chau, M.D.'s National Provider Identifier (NPI) is 1992766299, issued on 03/28/2006.
Does Patrick Chau, M.D. prescribe more brand-name or generic drugs? ▼
Patrick Chau, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $941K in brand drug costs.
How many Child & Adolescent Psychiatry Physician providers are there in the US? ▼
There are 6,300 Child & Adolescent Psychiatry Physician providers across 54 states in the US. The average Child & Adolescent Psychiatry Physician provider writes 608 Medicare Part D claims per year.
What drugs does Patrick Chau, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Patrick Chau, M.D.'s most frequently prescribed drugs include Fluoxetine Hcl, Trazodone Hcl, Olanzapine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Patrick Chau, M.D. accept Medicare? ▼
Patrick Chau, M.D. appears in CMS Medicare data with 4,690 Part D claims and 196 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Patrick Chau, M.D.'s credentials? ▼
Patrick Chau, M.D.'s NPI is 1992766299 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.